<html lang="en">
<head>
<title>Memory - The GNU C Library</title>
<meta http-equiv="Content-Type" content="text/html">
<meta name="description" content="The GNU C Library">
<meta name="generator" content="makeinfo 4.13">
<link title="Top" rel="start" href="index.html#Top">
<link rel="prev" href="Error-Reporting.html#Error-Reporting" title="Error Reporting">
<link rel="next" href="Character-Handling.html#Character-Handling" title="Character Handling">
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
<!--
This file documents the GNU C library.

This is Edition 0.12, last updated 2007-10-27,
of `The GNU C Library Reference Manual', for version
2.8 (Sourcery G++ Lite 2011.03-41).

Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002,
2003, 2007, 2008, 2010 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being ``Free Software Needs Free Documentation''
and ``GNU Lesser General Public License'', the Front-Cover texts being
``A GNU Manual'', and with the Back-Cover Texts as in (a) below.  A
copy of the license is included in the section entitled "GNU Free
Documentation License".

(a) The FSF's Back-Cover Text is: ``You have the freedom to
copy and modify this GNU manual.  Buying copies from the FSF
supports it in developing GNU and promoting software freedom.''-->
<meta http-equiv="Content-Style-Type" content="text/css">
<style type="text/css"><!--
  pre.display { font-family:inherit }
  pre.format  { font-family:inherit }
  pre.smalldisplay { font-family:inherit; font-size:smaller }
  pre.smallformat  { font-family:inherit; font-size:smaller }
  pre.smallexample { font-size:smaller }
  pre.smalllisp    { font-size:smaller }
  span.sc    { font-variant:small-caps }
  span.roman { font-family:serif; font-weight:normal; } 
  span.sansserif { font-family:sans-serif; font-weight:normal; } 
--></style>
<link rel="stylesheet" type="text/css" href="../cs.css">
</head>
<body>
<div class="node">
<a name="Memory"></a>
<p>
Next:&nbsp;<a rel="next" accesskey="n" href="Character-Handling.html#Character-Handling">Character Handling</a>,
Previous:&nbsp;<a rel="previous" accesskey="p" href="Error-Reporting.html#Error-Reporting">Error Reporting</a>,
Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
<hr>
</div>

<h2 class="chapter">3 Virtual Memory Allocation And Paging</h2>

<!-- %MENU% Allocating virtual memory and controlling paging -->
<p><a name="index-memory-allocation-231"></a><a name="index-storage-allocation-232"></a>
This chapter describes how processes manage and use memory in a system
that uses the GNU C library.

   <p>The GNU C Library has several functions for dynamically allocating
virtual memory in various ways.  They vary in generality and in
efficiency.  The library also provides functions for controlling paging
and allocation of real memory.

<ul class="menu">
<li><a accesskey="1" href="Memory-Concepts.html#Memory-Concepts">Memory Concepts</a>:              An introduction to concepts and terminology. 
<li><a accesskey="2" href="Memory-Allocation.html#Memory-Allocation">Memory Allocation</a>:            Allocating storage for your program data
<li><a accesskey="3" href="Locking-Pages.html#Locking-Pages">Locking Pages</a>:                Preventing page faults
<li><a accesskey="4" href="Resizing-the-Data-Segment.html#Resizing-the-Data-Segment">Resizing the Data Segment</a>:    <code>brk</code>, <code>sbrk</code>
</ul>

   <p>Memory mapped I/O is not discussed in this chapter.  See <a href="Memory_002dmapped-I_002fO.html#Memory_002dmapped-I_002fO">Memory-mapped I/O</a>.

   </body></html>